Average Co-Inventor Count = 2.25
ph-index = 3
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Ehwa Diamond Industrial Co., Ltd. (2 from 38 patents)
2. Ehwa Diamond Ind. Co., Ltd. (1 from 24 patents)
3 patents:
1. D502378 - Pad for grinding stone
2. D474666 - Pad for grinding stone
3. D447496 - Saw blade for cutting steel-reinforced structure